Device for effecting warp stop motion



June 27, 1933. R. FURUYA DEVICE FOR EFFECT ING WARP STOP MOTION Filed Sept. l7, 1951 2 Sheets-Sheet l WU W wfi o o I 0% Hm MM HH 0 0H QM lmw NH 0 mm o l "n db .Vull. 1.1. M UM m w m 01% \w June 27, 1933.

R. FURUYA 1,916,046

DEVICE FOR EFFEGTING WARP STOP MOTION Filed Sept. 17, 1931 2 Sheets-Sheet 2 :Wa/EN To R:

dTTORA/ETSY- Patented June 27, 1933 RIKISABUBO FUB'UYA,

. nane raraur @FFECE OF TOKYG FU, JAPAN DEVICE FOR EFFECTING WAR? STOP MOTION Application filed September 17, 1931.

The present invention relates to a device for effecting warp stop motion comprising a heald frame guided. in a loom for up-anddown movement. an oscillating feeler plate 5 mounted swingingly upon the heald frame, means to oscillate said feeler plate by the fore-and-aft strokes of the shuttle and means for swinging back the starting handle when a heddle drops.

The object of this invention is to obtain a device of improved construction for effecting warp stop motion. According to this invention, as each. heddle acts as a usual dropper and a common feeler plate is mounted upon the heald frame. the construction provides for ready detection of a broken warp the construction being much simplified and having high eiiiciency. This device may be attached to an ordinary loom by simple means and with increased efficiency.

()ther features and advantages of the invention will be clearly understood as the description proceeds with reference to the accompanying drawings. 25 In the drawings 1 is a front elevation of a loom embodying the present invention;

Fig. 2, a side View of the same;

Fig. 3, an enlarged front view of the main 30 part of this invention;

Fig. 4, an enlarged side view of the same;

Fig. 5 a perspective view of a movable rod and the parts connected therewith;

3 Fig. 6, a perspective View of a striking r hammer supported in an inoperative position;

Fig. 7, a detail showing a device for moving the hammer from an operative to an inoperative position;

Fig. 8, a perspective view of a device which oscillates the feeler plate,and

Fig. 9, a side view of a certain part shown in Fig. 8.

Referring to the drawings, 1 is the frame of the machine, 2 a heald frame and 3 and f are guide pulley and guide roll respectively. The heald frame 2111. es straight up-anddown movement by being guided between said pulleys 3 and rolls 4. A L -shaped heald O 5 is provided with two sets of spring bearings Serial No. 583,377.

6 and 7 each clamping a heddle supporting bar 8. The heddles are supported loosely by the upper and lower supporting bars 8 and are suspended upwardly when the warp is in tension. But, when a Warp breaks, the 116d- 55 die through which said broken thread has passed drops and its lowerend projects to a position to contact with the oscillating feeler plate 9.

The feeler plate 9 is attached to a shaft 10 mounted upon the heald frame 2. The shaft 10 extends beyond the heald frame and a lever 11 fixed to the shaft at its extended portion. The lever 11 is normally urged by spring 12 into contact with a pin 12 projecting from the heald frame 2. The lever ll has a pin 13 projecting laterally into the path of an arm 40 fixed to a movable rod 1% which passes through a guide bracket 15 and a guide P pin 16 swingingly supported by a bracket 17 fixed to a lay-sword 18 and is urged in one direction by a coiled spring 19- interposed between said pin and a collar 20 formed on the movable rod 1 The movable rod 14 has an upwardly bent portion 21 connected to a rope 22 passing around a guide pulley #3 supported by the bracket 17. and another guide pulley 2i sup ported by the shuttle-race 25 to a rod 26. 27 is a guide bar fixed to the bracket 17 and prevents the movable rod 14 from turning round its own axis but allows the same to move axially. The rod 26 passes through a closed cylindrical box 28 containing a spring 29 which urges the collar 30 of the rod to the bottom of the cylinder. One end of the rod 26 projects through the bottom of the box 28 into a position for supporting a hammer in an inoperative position. The hammer as shown in Fig. 6 consists of a sector 31 loosely mounted upon a stud 32 and a striking arm 33 projecting from the sector, the downward move mentof the hammer being limited by a pin 34.

The starting handle 35, when moved slight- 1y forwards from the starting position shown in Fig. 4, swings back inwardly to a stopping position by its own spring action as shown in a chain line in Fig. 1. It is provided with an abutting plate 38 which may be struck by the striking arm 33, if it moves forward with the shuttle-race 25, assuming that the striking arm takes the lower position (shown in dot-ted lines in Fig. l). The abutting plate 36 has an extended inclined portion 37 and ahorizontal extension 38 extended from the upper end of the inclined portion. As soon as the striking arm strikes the abutting plate 36, the starting handle swings back to a stopping position, when the inclined portion 37 lifts the striking arm to the horizontal portion 88, the said arm being automatically returned to inoperative position.

The following is the manner of operating the above device lVhen the machine is operating, the movable rod 14 makes to-and-fro axial movement according to the fore-and-aft stroke of the shuttle-race 25. The arm 40 also moves to and fro with the movable rod 14. During the backward movement it engages with the projecting pin 13 of the lever 11 rocking the lever against the action of the spring 12, while during the forward movement it releases the said projecting pin, so that the lever 11 swings back to its original position by the action of the spring. Thus the feeler plate 9 fixed to the shaft 10 repeats oscillating movement as the movable rod repeats its axial movement.

During the normal operation of the machine, that is to say, when there is no warp thread broken, each heddle is suspended by the warp tension. Therefore, the oscillating feeler 9 can not come into engagement with the heddles. However. if any one of the warp threads is broken. the heddle which has been suspended from the broken warp drops and comes into engagement with the oscillating feeler plate 9. If in such state the arm comes in contact with the pin 13 of the lever 11, the further backward movements of the arm 40 and the rod 14: are prevented. but the guide pin 16 relatively moved backwards compressing the spring 19 and the rope 22 is pulled forward relatively to the pulley Q8, pulling the rod 26 out-of engagement with the sector The sector then drops by its own weight and the striking arm 33 takes up the position shown in dotted lines in F ig. 4. At the next forward stroke of the shuttle-race, the striking arm 33 strikes the abutting plate 36 to release the starting handle 35 from its retaining means not shown. The starting handle swings back to the stop position by its own spring action and the inclined portion of the abutting plate 36 lifts the striking arm to an inactive position during such movement of the handle.

I claim:

1. A device for effecting warp stop motion comprising a heald frame having heddles; an oscillating feeler journaled in said frame; a lever fixed to said feeler; spring means for urging the lever in one direction; a pin projecting from said lever; a lay-sword; an aX- ially movable rod; an arm on said rod disposed in the path of swing of the pin; and means connecting said rod and lay-sword whereby axial movement is transmitted to said rod from the lay-sword during normal operation, and whereby when a hcddle drops the lay-sword will move with respect to the rod and effect the stop motion.

2. A device for effecting warp stop motion comprising a heald frame having heddles; an oscillating feeler journaled in the frame: a

lever ixed to said feeler; spring means for urging the lever in one direction; a pin projecting from said lever; an axially movable rod; an arm on said rod disposed in the path of swin of the pin; a laysword having a guide receiving the end of the movable rod; spring means for normally maintaining the rod and guide in llXQCl relation while permitting the lay-sword to move relatively-of the rod when the latter is prevented from moving by reason of a dropped heddle; a striking arm, and means operated by said rod to release the striking arm when heddle drops.

3. A device for effecting warp stop motion comprising a heald frame having heddles; an oscillating fcclcr journaled in the frame; a lever fixed to said feeler; spring means for urging the lever in one direction; a pin projecting from said lever; an axially movable rod; an arm on said rod disposed in the path of swing of the pin; a lay-sword having a guide receiving the end of the movable rod; spring means normally maintaining the rod and lay-sword in fixed relation while permitting the lay-sword to move relatively to the rod when the latter is prevented from moving by reason of a dropped heddle; a starting handle; a striking arm cooperating with the handle; means connected to the rod for moving the striking arm to actuating position, and means for moving the striking arm to inoperative position during the swinging movement of the starting handle.

RIKISABURO FUBUYA. 

